It's compatiable to all following Models:

Nokia N70, Nokia N90, Nokia 3220, Nokia 3230, Nokia 5140, Nokia 5140i, Nokia 5300, Nokia 6020, Nokia 6021, Nokia 6060, Nokia 7260

Chemistry: Li-ion (Lithium Ion technology) delivers long lasting talk times
Ratings: 3.7 Volts 1250 mAh Capacity
Weight 0.08 kg